Welch, Paul Smith
McGraw-Hill, 1952
Buku Teks
Cole, Gerald A.
Waveland, 1994
Buku Teks
Wetzel, Robert G.
Saunders College Publishing, 1983
Buku Teks
Schweizerbart'sche Verlagsbunchhandlung, 1987
Buku Teks
Lind, Owen T.
Kendall / Hunt Publ., 1985
Buku Teks